Accuracy and Safety of Robot-Assisted versus Fluoroscopy-Guided Posterior C1 Lateral Mass and C2 Pedicle Screw Internal Fixation for Atlantoaxial Dislocation: A Preliminary Study

Table 1

Comparison of the patients’ demographic characteristics.

	FH group ()	RA group ()
Age (years)			0.46
Gender (n)
Male	10	6	0.38
Female	4	5
BMI (kg/m^2)			0.302
Symptom duration (months)			0.41
Postoperative hospital stay (days)			0.38
Follow-up time (months)			0.45
Pre-JOA			0.79
Pre-ODI			0.85
Pathology
Trauma	5	4	0.98
Degeneration	3	2
Congenital malformation	3	3
RA	3	2
Tumor	0	0

Data are presented as or number (%) unless otherwise indicated. SD: standard deviation; BMI: body mass index; RA: rheumatoid arthritis.